city crews and volunteers began sprucing up the city during the baseball season. focusing on schools and other prominent places in the city. traffic islands and city property along streets were swept of trash and weeds. >> today is our first team event so we did district six downtown soma area so we did clean up lots of mulching projects, lots of greening man projects we also do graffiti abatement,sweeping the streets and greening up the neighborhood. it's a real good turnout and it's fun to do. >> we cleaned up all the garbage on this street and weeded all these tree bases. >> the giant sweep days are scheduled in february. april. june and september. >> it was beautiful. one of the remarkable things today is that if your looking out on the rise and it was crystal clear. you could practically look out and to see because of a beautiful arctic air mass. it is producing cold temperatures at night. last night, below freezing at that will be the same story for tonight. right now, not bad. 40's, '50's, san francisco, oakland. santa clara, and a bit cooler in pleasanton,